License forgery in Brocade Fabric OS (FOS) hardware platforms running any version of Brocade Fabric OS software,
Priority LOW 35CWE-327Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-327.
Summary
Brocade Fabric OS (FOS) hardware platforms running any version of Brocade Fabric OS software, which supports the license string format; contain cryptographic issues that could allow for the installation of forged or fraudulent license keys. This would allow attackers or a malicious party to forge a counterfeit license key that the Brocade Fabric OS platform would authenticate and activate as if it were a legitimate license key.
Why it matters now
EPSS 0.00244 15th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Brocade | Brocade Switches | All Version | — | No fix listed | CNA |
- Brocade Switches VendorBrocade Affected All Version Fixed in — No fix listed CNA
CPE configurations NVD · 13
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:broadcom:fabric_operating_system:*:*:*:*:*:*:*:* | all versions | Vulnerable | Broadcom |
| cpe:2.3:h:broadcom:brocade_300:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Broadcom |
| cpe:2.3:h:broadcom:brocade_610:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Broadcom |
| cpe:2.3:h:broadcom:brocade_6505:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Broadcom |
| cpe:2.3:h:broadcom:brocade_6510:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Broadcom |
| cpe:2.3:h:broadcom:brocade_6520:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Broadcom |
| cpe:2.3:h:broadcom:brocade_7800:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Broadcom |
| cpe:2.3:h:broadcom:brocade_7810:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Broadcom |
| cpe:2.3:h:broadcom:brocade_7840:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Broadcom |
| cpe:2.3:h:broadcom:brocade_g620:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Broadcom |
- cpe:2.3:o:broadcom:fabric_operating_system:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Broadcom
- cpe:2.3:h:broadcom:brocade_300:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Broadcom
- cpe:2.3:h:broadcom:brocade_610:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Broadcom
- cpe:2.3:h:broadcom:brocade_6505:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Broadcom
- cpe:2.3:h:broadcom:brocade_6510:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Broadcom
- cpe:2.3:h:broadcom:brocade_6520:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Broadcom
- cpe:2.3:h:broadcom:brocade_7800:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Broadcom
- cpe:2.3:h:broadcom:brocade_7810:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Broadcom
- cpe:2.3:h:broadcom:brocade_7840:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Broadcom
- cpe:2.3:h:broadcom:brocade_g620:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Broadcom
Show 3 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:h:broadcom:brocade_g630:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Broadcom |
| cpe:2.3:h:broadcom:brocade_x6-4_director:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Broadcom |
| cpe:2.3:h:broadcom:brocade_x6-8_director:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Broadcom |
- cpe:2.3:h:broadcom:brocade_g630:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Broadcom
- cpe:2.3:h:broadcom:brocade_x6-4_director:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Broadcom
- cpe:2.3:h:broadcom:brocade_x6-8_director:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Broadcom
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-27795
- 2026-10-03 Alias added: GHSA-phm5-rgh2-qxcf
References
More Brocade vulnerabilities
- TI-2025-01721 Code injection exposure in Fabric OS 9.1.0 through 9.1.1d6 KEVCVSS 4.0HIGH 8.6
- TI-2016-06760 Path traversal in Brocade Network Advisor versions released prior to and including 14.0.2 CVSS 3.0CRITICAL 9.8
- TI-2024-19729 hard-coded credentials in the documentation that appear as the appliance root password CVSS 3.1CRITICAL 9.8
- TI-2016-06762 Path traversal in Brocade Network Advisor versions released prior to and including 14.0.2 CVSS 3.0HIGH 7.5
- TI-2018-04739 OS command injection in Brocade Network Advisor CVSS 3.0CRITICAL 9.8
- TI-2016-06761 Path traversal in Brocade Network Advisor versions released prior to and including 14.0.2 CVSS 3.0HIGH 7.5
Sources
- CVE-2021-27795 · CVE Program
- CVE-2021-27795 · NVD
- FIRST EPSS
- GHSA-phm5-rgh2-qxcf · GitHub Advisory Database · CC BY 4.0
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